Inspection Procedure
WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE OF INTELLIGENT TESTER (STEERING PAD SWITCH MODULATOR)
- Check the DATA LIST for proper functioning of the steering pad switch.
Steering pad switch modulator:
DATA LISTItem Measurement Item / Display (Range) Normal Condition Diagnostic Note AV MODE SW Audio mode switch / ON or OFF ON: Audio mode switch is pushed
OFF: Audio mode switch is not pushed- AV VOL UP SW Audio volume UP switch / ON or OFF ON: Audio volume UP switch is pushed
OFF: Audio volume UP switch is not pushed- AV VOL DOWN SW Audio volume DOWN switch / ON or OFF ON: Audio volume DOWN switch is pushed
OFF: Audio volume DOWN switch is not pushed- AV SEL UP SW Audio selector UP switch / ON or OFF ON: Audio selector UP switch is pushed
OFF: Audio selector UP switch is not pushed- AV SEL DOWN SW Audio selector DOWN switch / ON or OFF ON: Audio selector DOWN switch is pushed
OFF: Audio selector DOWN switch is not pushed- AV VOL SET SW Audio volume set switch / ON or OFF ON: Audio volume set switch is pushed
OFF: Audio volume set switch is not pushed- VOICE HOOK SW* Speech recognition hook switch / ON or OFF ON: Speech recognition hook switch is pushed
OFF: Speech recognition hook switch is not pushed- HINT:
*: w/ Navigation SystemOK:
ON appears on the screen when each steering pad switch is pushed.
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG: Go to next step
- Check the DATA LIST for proper functioning of the steering pad switch.
- REPLACE STEERING PAD SWITCH MODULATOR
- Replace steering pad switch.
- Check if the vehicle is equipped with a navigation system.
Result
RESULT CHARTResult Proceed to w/ Navigation system A w/o Navigation system B
B: END
A: Go to next step
- RESET STEERING PAD SWITCH MODULATOR
- The following procedure must be completed within 30 seconds:
- Turn the ignition switch to ACC.
- Press the "Mode" button for at least 10 seconds.
- Within 5 seconds, press channel up twice and channel down twice.
NEXT: END
- The following procedure must be completed within 30 seconds: